PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 28122-0 1978 Gamma-glutamyl transferase of rat and human intestine: greater enhancement of activity by dipeptides than by amino acids or longer peptides. Dipeptides 90-100 gamma-glutamyltransferase 1 Rattus norvegicus 0-26